Battery Information

Size the batteries at approximately twice the estimated total amp-hour usage. Doubling the expected amp-hour usage ensures that the batteries will not be overly discharged and extends battery life.

Resist the temptation to skip this doubling step. More capacity is better since you will have more reserve capacity, be better able to handle large loads and surge loads, and your battery won’t be discharged as deeply.

Battery life is directly dependent on how deeply the battery is discharged. The deeper the discharge, the shorter the battery life.

Troubleshooting If you find that the system shuts down when appliances with large motors are started, the problem may be that this motor is too much for the battery. Even though you calculated the amp-hour requirements appropriately, the startup of a large motor makes high demands on the battery. You may find that adding more amp-hours (in the form of extra batteries or replacement with a bigger battery) solves the problem.

Table 5 Battery Sizing Example

 

 

 

Daily watt-hours needed for

 

(A) Power Consumption

(B) Operating Time per Day

this appliance

Appliance

(Watts)

(Hours)

(= A × B)

 

 

 

 

 

 

 

 

TV & VCR

200 W

2 hours

400 Wh

Small microwave oven

800 W

15 min = 1/4 hour

200 Wh

3 lamps, 60 W each

180 W

4 hours

720 Wh

Coffee maker

600 W

15 min = 1/4 hour

150 Wh

Hair dryer

1500 W

6 min = 1/10 hour

150 Wh

 

 

 

 

Total daily watt-hours of AC load

 

 

1620 Wh

 

 

 

 

 

 

 

 

× Number of days between charges

 

 

3

 

 

 

= Total watt-hours of AC load between charges

 

4860 Wh

Battery Ah used between charges (divide by 10 for 12 volt system; divide by 20 for 24 volt system)

486 Ah

 

 

 

 

Recommended Battery Bank Size in Ah (multiply by 2)

972 Ah

This example illustrates how quickly your battery needs can escalate. To reduce the required battery bank size, you can either conserve energy by eliminating or reducing the use of some loads, or recharge more frequently.

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Freedom SW 3000 Installation Guide

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Xantrex Technology SW3000 user service Battery Information
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SW3000 specifications

Xantrex Technology SW3000 is a versatile and powerful inverter that plays a crucial role in providing reliable electrical power to off-grid and mobile applications. Designed specifically for those who require a dependable power source in remote locations or for recreational vehicles, the SW3000 stands out with its excellent features and innovative technologies.

One of the primary characteristics of the SW3000 is its ability to deliver a continuous output of 3000 watts, making it suitable for a wide range of appliances and tools. The inverter can handle startup loads for inductive devices, such as refrigerators and air conditioners, with ease. This capability ensures that users can operate their essential equipment without the worry of overloading the system.

The SW3000 inverter is equipped with advanced Pure Sine Wave technology, ensuring that the output power is clean and stable. Pure Sine Wave inverters are crucial for sensitive electronics, as they provide a smooth power output that mimics the utility grid. This feature protects your devices from potential damage caused by lower-quality inverter systems.

Additionally, the Xantrex SW3000 offers integrated features such as an automatic transfer switch, which seamlessly transfers power between the inverter and utility power when both are available. This ensures uninterrupted operation and convenience for the user. The inverter also has a user-friendly interface, including LED indicators that provide information on the inverter's status, allowing for easy monitoring.

Another significant aspect of the SW3000 is its robust thermal management. The design includes built-in cooling fans that prevent overheating during heavy use, ensuring the longevity of the unit. The inverter also comes with multiple safety features, such as over-voltage, under-voltage, and over-temperature protection, offering peace of mind.

Furthermore, the SW3000 is engineered for easy installation, including versatile mounting options, making it an excellent choice for various applications, from boats and RVs to cabins and backup power systems. Its durable design enables it to withstand harsh environmental conditions, ensuring reliable performance in diverse settings.

Overall, the Xantrex Technology SW3000 inverter combines power capacity, advanced technology, and user-friendly features, making it a top choice for those seeking reliable power solutions in off-grid and mobile environments.
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